Mailbox



FIG. 1 is a front view of a mailbox;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side perspective view thereof; and,

FIG. 6 is a bottom plan view thereof. 

I claim the ornamental design for a mailbox, as shown. 